Apple macOS 10.12.0 libarchive link following

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

A vulnerability was found in Apple macOS 10.12.0 (Operating System). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component libarchive. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect integrity, and availability.

The weakness was disclosed 10/24/2016 by Omer Medan with enSilo as HT207275 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2016-4679 since 05/11/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

An issue existed within the path validation logic for symlinks. This issue was addressed through improved path sanitization.

The vulnerability scanner Nessus provides a plugin with the ID 94337 (Apple TV < 10.0.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370175 (Apple Mac OS X Security Update Sierra 10.12.1, El Capitan 2016-002 and Yosemite 2016-006 Not Installed (APPLE-SA-2016-10-24-2)).

Upgrading to version 10.12.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (94337). The entries 93042, 93046, 93047 and 93052 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Link following
CWE: CWE-59
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 94337
Nessus Name: Apple TV < 10.0.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-03 February-2017
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 10.12.1

Timelineinfo

05/11/2016 🔍
10/24/2016 +166 days 🔍
10/24/2016 +0 days 🔍
10/24/2016 +0 days 🔍
10/25/2016 +1 days 🔍
10/27/2016 +2 days 🔍
02/20/2017 +116 days 🔍
09/28/2022 +2046 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207275
Researcher: Omer Medan
Organization: enSilo
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4679 (🔍)
SecurityTracker: 1037086
SecurityFocus: 93849 - Apple macOS/watchOS/iOS/tvOS Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍

Entryinfo

Created: 10/25/2016 09:05
Updated: 09/28/2022 11:58
Changes: 10/25/2016 09:05 (61), 05/17/2019 16:49 (23), 09/28/2022 11:58 (4)
Complete: 🔍

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